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Chemistry Mcqs

Which statement is consistent with Hunds rule ?

Chemistry Basic Concept, Chemistry Mcqs /
Which statement is consistent with Hunds rule ?

A. Electrons fill orbitals with parallel ss until all the orbitals of the same energy are half filled then they go into sub-shells with anti-parallel (opposite) s.
B. The electrons in the same atom cannot have the same four quantum numbers
C. There is maximum of two electrons is an orbital.
D. None

Which statement is consistent with Hunds rule ? Read More »

Chemistry Basic Concept, Chemistry Mcqs

When an electron is moving with velocity of 2.188 x 106 ms-1 in the first orbit of Bohrs model of hydrogen. The de Broglie wavelength of electron is______________?

Chemistry Basic Concept, Chemistry Mcqs /
When an electron is moving with velocity of 2.188 x 106 ms-1 in the first orbit of Bohrs model of hydrogen. The de Broglie wavelength of electron is______________?

A. 0.33 nm
B. 0.34 nm
C. 0.35 nm
D. 0.36 nm

When an electron is moving with velocity of 2.188 x 106 ms-1 in the first orbit of Bohrs model of hydrogen. The de Broglie wavelength of electron is______________? Read More »

Chemistry Basic Concept, Chemistry Mcqs

As a substance moves from a solid to a liquid all of the following changes occur except ?

Chemistry Basic Concept, Chemistry Mcqs /
As a substance moves from a solid to a liquid all of the following changes occur except ?

A. molecules become more disordered.
B. K.E of the molecules decreases
C. intermolecular forces become weaker.
D. molecules move more frequently.

As a substance moves from a solid to a liquid all of the following changes occur except ? Read More »

Chemistry Basic Concept, Chemistry Mcqs